Engine valve



Jan. 31, 1928. I 1,657,560 G. P. ABORN n ENGINE VALVE Filed May 29. 1926 2 SheetS-Sheet 1 w mi2 Jan. 3l, 1928.

1,657,560 G. P. ABoRN ENGINE VALVE 2 Sheets-Sheet 2 Filed May 29. 1926 Patented Jan. 31, 1928.

UNITED STATES resiste PATENT .)1=1fic.l=;.

GEORGE E. ABORll", OF WABAEN, MASSACHUSETTS, ASSIGNOR TQ W'ORTHIVNGTON BUMP AND MACHINERY CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF. VIR- G-INIA.

ENGINE Application tiled May 29,

This invention relates to steain engines equipped with lluid actuated valves and more especially to internal valve gear 'for direct acting` steain pumping engines in which a i pressure actuated inain valve governin` the distribution of steain to the opposite sides of the working piston is controlled by a pressure actuated auxiliary valve.

Among the objects of the invention are the provision of certain improvements in the construction and inode or' operation of such valve gear, insuring theeilicieincy andy reli abilitythereof and providingv a siniple, conipact and durable inside steam valve gear.

In the accoinpanyinp,v drawings forming a part of this specification there is shown by Way of illustration a preferred embodiment ol the invention and this construction 'will noiv be described in detail and the features forniingthe invention then specifically pointed out in the claiins. i

In `the drawings,- e

Figure 1 is a view of the device in longitudin al section with soine ci the parts broken avvay; i

Figure is a transverse sectional viev; thereof on the line 2 2 or' Figure 1;

Figure 3 is a top plan vienT ot the Inain valve seat;

Figure l is a section on the kline lr-t of Figure 3; D

lligure 5 is asectional view on the line 5-5 of Figure 31;

Figure 6 is a diagrammatic viewp- Figure 7 is an enlarged top planvieiv of the niain valve and its seat;

Figure S is a top plan view oi' ther auXiliary valve seat; and t YFigure 9 is a top plan view of the auxiliary' valve. Y

Referring loV the drawings, A is the engine cylinder within which reciprocatesl the inain piston 10. The cylinder er is provided 4with the usual seat 11 for the valve chest and inain valve seat 12 having steain ports and passages 13, 14, 'for the delivery of steain to and from the opposite ends of the cylinder A and an exhaust port and passage 15, these ports being controlled by a inain` `valve 16 which inay be ot' t-he ,coininon' 'Il type shown. Steam is supplied tothe valve chest B through passage 17 in the steam chest seat 11 and theexhaust frein passage 15 is discharged through exhaust outlet 18, as

VALVE.

192e. serial No. 112,462.

rEhe inain valve 16 is inoved across its seat by a inain valve plunger 19 providing' two pistons 20, 21, operating respectively' Within inain valve plungercylinders 22, 23, formed Within the valve chest B. Steam is delivered to and from the niain valve plunger Cylinders 22, 253, through'respectively'passages 1 and 2 running through the inainvalve plunger 19. and terminating in an auxiliary valve seat 211 provided with an` exhaust port 3, these ports beinginider the control ott a suitable auziiliary valve 41. The main valve 16 has a cylindrical projection litting `Within a recess 26 in the central part of 'the auriliary plunger 1S) so that thevalve 16 is inoved bythe plunger 19 While free therefrom for movement towardand from its seat-'12, and a passage 27 extendingth'rough the projection 25 to connect the exhaust port 3 ot the auxiliary valve seat 211 with the inain valve cavity for exhaust through, eXha st port and passage 15.`

The auxiliary valve et is moved across its seat by' an `ausil-niry plunger 28, providing tivo pistons 29, 30, for which suitable cylinders 81, 32, are provided in tliefvalve chest B. Sten-ni is deliveredto thecylinders 31, 32, respectively through passages 5,6, opening' into ports onopposite sides of the inain valve seat 12 and steain` is exhausted therefrom through `passages 7, 8, opening into ports on the saine sides of the, ifnainvalve seat 12 as,respectively, ports 5, 6; The inain valve seat 12 is provided with steam'y supply ports and passages 9,9', between, respectively, the ports 5, 7, and the ports 6', 8, which connect With the opposite ends of the engine cylinder'. Grooves a, 6in the opposite edges oit the main valve 15` are adapted to connect, respectively, the ports 9 to 5 and 9" to 6 for supply of steam to theV proper auxiliary cylinder and exhaust ports 7, 8, are connected at the proper time to niain enu haust port-,15 hy, respectively, slotted grooves c, d. i i

`The auxiliary valve plunger inay be locked hy steain pressure applied thereon at the end of its ineveinent and for this-purpose it inaybeprovided with suitable piston projections 33, 3-1, operating `Withiny cylinders 35, 36,"torined in the valve` chest B. Steam is supplied to., and exhausted romthe cylinders 35., 536, through, respectively, passages ai, a

which are preferably controlled by the main valve 16 and may open, resliectively, into main valve seatpassages 13, ll, as shown.

rl`he device operates as follows:

lilith the parts in the position shown in Figures l1. and (l, steam is suppl ied troni the valve chest ll through port and passage lll to the lel't hand end ot the main cylinder A for mmuuncnto't the main piston l() toward the right, the main valve lll at this time connecting passage l-l with exhaust passage l5 4for,exhaustA ol steam 'from the opposite side ol`A the main piston, and connecting ports 9 and (3 through groove D for delivery et steam to auxiliary plunger cylinder 32 at the proper time, and connecting port 7 to ex haust port l5 through slotted groove c for exhaust ol" steam from auxiliary plunger cylinder 3l, the main valve being held in this position by steam passing through the uncovered end of port l to main valve plunger cylinder 2Q. As the main piston 10 conw tinues its movement, it uncovers port and passage 9 for delivery of steam through groove Z) and port and passage G to auxiliary cylinder 32 for movement ot' auxiliary plunger 28 and auxiliary valve et by piston 30. During this niovement of the auxiliary plunger 28, auxiliary plunger cylinder 3l is connected through port and passage and slotted groove c to the main exhaust port l5 for exhaust of steam therefrom and the early portion only of its movement is opposed by steam pressure within locking cylinder 35 on locking plunger 3? This pressure, however, is removed when the auxiliary valve l has moved suiicient-ly to uncover port and passage 2 for the delivery of steam to main valve plunger cylinder 23, and connect port l to exhaust port 3 for the exhaust of steam from main valve plunger cylinder 22, thus producing movement of main valve plunger to the left. This movement of the main valve plunger 19 causes the main valve to open lport and passage lll for the supply of steam to the right hand end of the engine cylinder A, simultaneously connecting the opposite end to exhaust through port 13 and exhaust port l5. Immediately the ports 123 and lei; are connected in this manner steam is exhausted from locking plunger cylinder 35 through passage 37 and supplied to locking plunger 34 and cylinder 36 through passage 38. y y

The opposite stroke of the piston 10 is accomplished by a reversal of the movements above described.

The movements of the auxiliary plunger 2S may be cushioned by locating the exhaust passages 'for the auxiliary cylinders 3l, 32, as shown, so that they are overrun b the auxiliary pistons 29, 30, and the auxiliary plunger 28 and main valve plunger 19 pre erably move transversely to each other so that their combined movements cause auxil iary ports l or 2 to be covered by the edge ot the auxiliary valve fl near the end of the movement oli' the main valve plunger ll) for ci'lshioning thereof.

The main falve l(3 and auxiliary valve -l may be held to their seats in any suitable manner but are preferably held yieldingly to their seats by, respectively, springs and all), substantially as shown.

lt 'vvill be understood that. the invcntimi is not to he limited to the specific construction or arrangement ot thc parts illustrated hut that these may he modified vvithin liu: invention.

l.Vliet l claim is:

l. In a steam engine valve gear, the com-- bination with a steam cylinder having steam and exhaust ports, ot a main valve controlling said ports, a plunger moving the main valve, an auxiliary valve mounted on the main valve plunger and moving transversely thereto ttor controlling the supply el steam lo and 'from the opposite ends oli said plunger, and auxiliary valve plunger moving the auxiliary valve, means cmltrolled by the main valve for moving the auxiliary plunger by stea 1n from the steam cylinder, and means for applying steam pressure on the auxiliary plunger lior locking it .in positiim at the end o'li its movement.

In a steam engine valve gear, the coun hination with a cylinder havingl steam and exhaust ports, of a main valve controlling said ports, a plunger for moving the main valve, an auxiliary valve for controlling the Isupply of steam to and trom the opposite ends oit' the main valve plunger' and irunintcd on the main valve plunger and moving transversely thereto, an auxiliary plunger ior `moving the auxiliary valve, ports and passages controlled by the main valve .tor thc delivery of steam to and from the opposite ends et the auxiliary plunger, locking plun ers carried by the auxiliary valve plungtu, and means for applying live steam on the locking plungers.

l. ln a steam engine valve gear, the com hination with a cylirnler havingl strani and exhaust ports, of a main lvalve controlling said ports, a plunger tor moving ilul nlain valve, au auxiliary valve for (':ontrolling the supply oil steam to and from the opposite ends of the main valve plunger and mournful. on the main valve plunger and moving transversely thereto, an auxiliary plunger for moving the auxiliary valve, ports and passages controlled by the main valve lor the delivery ot steam to and troni the opposite ends of the auxiliary plunger, locking plungers carried by the auxiliary valve plunger, and means controlled by the main valve for applying live steani on the locking plungers.

4C. In a steam engine valve gear, the coinllll lill

lim

liiiiation with a cylinder having steam and exhaust ports, of a main valve controlling said ports, a plunger for moving the main valve, ,an auxiliary valve for controlling the supply of steam to and from the opposite ends oit the main valve plunger' and mounted on the main valvew plunger and moving transversely thereto, an auxiliary plunger tor moving the auxiliary valve, ports and passages controlled by the main valve .tor the delivery ot steam to and from the opposite ends ot the auxiliary plunger, means vfor eushioningthe movements of the main valve plunger, means `for cushioning the movements ol the auxiliary valve plunger,

`.locking pluiigers carried by the auxiliary valve plunger, and means for applying live steam on the locking plungei's.

5. ln a steam engine valve gear, the conihination with a cylinder having steam and exhaust ports, of a main valve controlling said ports, a plunger for moving the inaiii valve, an auxiliary valve for controlling the supply of steam to and from the opposite ends of the main valve plunger and mounted on the main valve plunger and n'ioving transversely thereto, an auxiliary plunger tor moving the auxiliary valve, Jorts and passages controlled by the main valve for the delivery of steam to and from the opposite ends of the auxiliary plunger, means for cushioning the movements of the main valve plunger, means for cushioning the move- 4valve for a o lvinO live steam on the loelino' u b D plungers.

6. In a steam engine valve gear, the eembmation with a cylinder having steam and exhaust ports, of a fluid actuated-main valve l controlling said ports, an auxiliary valve controlling the movement of the main valve, an auxiliary plunger for moving the auxiliary valve, a port and passage in the main valve seat for delivery of steam to eaeh end of the auxiliary plunger, a steam supply port and passage in the main valve seat for eaeli of said ports and passages opening into opposite ends ot' the Cylinder, a groove in the main valve for eonneeting'eaeh of said ports and passages with its steam supply port and passage, an exhaust port and passage in the main valve seat for each end of the auxiliary plunger, a slotted groove in the main valve for connecting eaeh of said auxiliary cylinder exhaust ports and passages' with the cylinder exhaust port, looking plungers torm ing extensions on the auxiliary plunger, and ports and passages controlled by the main valve for applying looking steam on the locking plungers.

In testimony whereof, I have hereunto set my hand.

GEORGE P. ABORN. 

